Knee protector



FIG. 1 is a 1st perspective view thereof;

FIG. 2 is a 2nd perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The bottom view is omitted because it is plain and unornamental and forms no part of the claimed design.

The portions of the knee protector shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a knee protector, as shown and described. 